Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Allowances for accounts receivable	$ 4,768	$ 3,584
Replacement cost, inventories	$ 140,544	$ 138,882
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,988	9,988
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000	30,000
Common stock, shares issued	23,211	23,159
Common stock, shares outstanding	23,092	23,010
Treasury stock, shares	119	149
Series B Junior Preferred Stock [Member]
Preferred stock, par value	$ 0.00	$ 0.00
Preferred stock, shares authorized	400	400